From ebf9a784a9f7f4148a669dbb39e7cd50df779a14 Mon Sep 17 00:00:00 2001
From: James Rowe <jroweboy@gmail.com>
Date: Thu, 11 Jan 2018 19:21:20 -0700
Subject: Massive removal of unused modules

---
 src/audio_core/codec.cpp | 127 -----------------------------------------------
 1 file changed, 127 deletions(-)
 delete mode 100644 src/audio_core/codec.cpp

(limited to 'src/audio_core/codec.cpp')

diff --git a/src/audio_core/codec.cpp b/src/audio_core/codec.cpp
deleted file mode 100644
index 6fba9fdae..000000000
--- a/src/audio_core/codec.cpp
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2016 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <array>
-#include <cstddef>
-#include <cstring>
-#include <vector>
-#include "audio_core/codec.h"
-#include "common/assert.h"
-#include "common/common_types.h"
-#include "common/math_util.h"
-
-namespace Codec {
-
-StereoBuffer16 DecodeADPCM(const u8* const data, const size_t sample_count,
-                           const std::array<s16, 16>& adpcm_coeff, ADPCMState& state) {
-    // GC-ADPCM with scale factor and variable coefficients.
-    // Frames are 8 bytes long containing 14 samples each.
-    // Samples are 4 bits (one nibble) long.
-
-    constexpr size_t FRAME_LEN = 8;
-    constexpr size_t SAMPLES_PER_FRAME = 14;
-    constexpr std::array<int, 16> SIGNED_NIBBLES = {
-        {0, 1, 2, 3, 4, 5, 6, 7, -8, -7, -6, -5, -4, -3, -2, -1}};
-
-    const size_t ret_size =
-        sample_count % 2 == 0 ? sample_count : sample_count + 1; // Ensure multiple of two.
-    StereoBuffer16 ret(ret_size);
-
-    int yn1 = state.yn1, yn2 = state.yn2;
-
-    const size_t NUM_FRAMES =
-        (sample_count + (SAMPLES_PER_FRAME - 1)) / SAMPLES_PER_FRAME; // Round up.
-    for (size_t framei = 0; framei < NUM_FRAMES; framei++) {
-        const int frame_header = data[framei * FRAME_LEN];
-        const int scale = 1 << (frame_header & 0xF);
-        const int idx = (frame_header >> 4) & 0x7;
-
-        // Coefficients are fixed point with 11 bits fractional part.
-        const int coef1 = adpcm_coeff[idx * 2 + 0];
-        const int coef2 = adpcm_coeff[idx * 2 + 1];
-
-        // Decodes an audio sample. One nibble produces one sample.
-        const auto decode_sample = [&](const int nibble) -> s16 {
-            const int xn = nibble * scale;
-            // We first transform everything into 11 bit fixed point, perform the second order
-            // digital filter, then transform back.
-            // 0x400 == 0.5 in 11 bit fixed point.
-            // Filter: y[n] = x[n] + 0.5 + c1 * y[n-1] + c2 * y[n-2]
-            int val = ((xn << 11) + 0x400 + coef1 * yn1 + coef2 * yn2) >> 11;
-            // Clamp to output range.
-            val = MathUtil::Clamp(val, -32768, 32767);
-            // Advance output feedback.
-            yn2 = yn1;
-            yn1 = val;
-            return (s16)val;
-        };
-
-        size_t outputi = framei * SAMPLES_PER_FRAME;
-        size_t datai = framei * FRAME_LEN + 1;
-        for (size_t i = 0; i < SAMPLES_PER_FRAME && outputi < sample_count; i += 2) {
-            const s16 sample1 = decode_sample(SIGNED_NIBBLES[data[datai] >> 4]);
-            ret[outputi].fill(sample1);
-            outputi++;
-
-            const s16 sample2 = decode_sample(SIGNED_NIBBLES[data[datai] & 0xF]);
-            ret[outputi].fill(sample2);
-            outputi++;
-
-            datai++;
-        }
-    }
-
-    state.yn1 = yn1;
-    state.yn2 = yn2;
-
-    return ret;
-}
-
-static s16 SignExtendS8(u8 x) {
-    // The data is actually signed PCM8.
-    // We sign extend this to signed PCM16.
-    return static_cast<s16>(static_cast<s8>(x));
-}
-
-StereoBuffer16 DecodePCM8(const unsigned num_channels, const u8* const data,
-                          const size_t sample_count) {
-    ASSERT(num_channels == 1 || num_channels == 2);
-
-    StereoBuffer16 ret(sample_count);
-
-    if (num_channels == 1) {
-        for (size_t i = 0; i < sample_count; i++) {
-            ret[i].fill(SignExtendS8(data[i]));
-        }
-    } else {
-        for (size_t i = 0; i < sample_count; i++) {
-            ret[i][0] = SignExtendS8(data[i * 2 + 0]);
-            ret[i][1] = SignExtendS8(data[i * 2 + 1]);
-        }
-    }
-
-    return ret;
-}
-
-StereoBuffer16 DecodePCM16(const unsigned num_channels, const u8* const data,
-                           const size_t sample_count) {
-    ASSERT(num_channels == 1 || num_channels == 2);
-
-    StereoBuffer16 ret(sample_count);
-
-    if (num_channels == 1) {
-        for (size_t i = 0; i < sample_count; i++) {
-            s16 sample;
-            std::memcpy(&sample, data + i * sizeof(s16), sizeof(s16));
-            ret[i].fill(sample);
-        }
-    } else {
-        for (size_t i = 0; i < sample_count; ++i) {
-            std::memcpy(&ret[i], data + i * sizeof(s16) * 2, 2 * sizeof(s16));
-        }
-    }
-
-    return ret;
-}
-};
-- 
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